Emergency exit-lock.



UNITED STATES PATENT OFFICE. t

HENRYYH. DUPONT, OF INDIANAPOLIS, NDIAN` ASSIYGNOR T VQN DUPRIN :FIRE

EXIT LATCH C0.. A COPAR'I'NERSHIP.

MRGENCY EXIT-Lock.

specification of Letters Patent.

Application fiied November 9. 1908. Serial No. 461,691.

T o a?? 'mmm 'i ma]] cancer-n:

('ilizvn of thxl linitml St'atesJ'exhling nt lnilianapolk in the ronnty nt iarinn :nnl s State of indianznhzng1 inreniml vortain new anti n ei`nl l.-t in paniw in ul-h building; owing to the fzu'l thzzl the exit iloors were lm-l-:Nl ngniwt openingt`ruln the outside aml r'onseqnentl}` tortu-(l against opt'ning by lnerr preswre l'rozn the iiinle.

The object of niy present iuvention is to prodnee n strnt'ture which may be readily O attaehed to the inner fare of exit doors and b \""ineans of which the (loor while normally openable from the outside in an ordinaryv Jnanner, may nevertheless he readily loeketi against such mzmipnlation, `Yet. in cases of 2? pnnie, etc.. will bo openable by mere pressure in the (lireetion of opening from the inshle. the parts being; So combined and arrangetl that they may be applied to single or twin doors in a manner whirh will nothe in any way nnsightly.

The a'eompan \;'ing (h'awings illnstrate my invention. i

Heartt is an insirle eierntion of a pair of twin doors eqnippeil with my invention:

'Finn "2 a detail of the internal members of the left hand loel: shown in Fig. 1; Fig. 3 a sertiun on line 3 3 of Fig: Fig. Jr a Section. on line 4 4 of Fig. 5, of the. latching holt for one of the twin doors; Fig. a section on line of Fig. 4; Fig. G a perspective iletnil of the right hand door shown in Fig'. l; Fig. 7 a iletail of the interior niechanifiln of the lovk lwhown in Fig. 6 the seetion being tata-n on line 7 7 of Fig. 8; Fig. 8 a section on line 8 8 of Fig. 7.

In the drawings, 10 inclicates the nor- `mally stationary anal unnsed door of a pair 'of twin doors, and 11 indicates the other of 'said doors. It is to be horne in mind that the door '11, with its attachments, may he nsetl inthe inanner of an ordinary single door, without. alterations, .Door 10 is normally stationary and is held by bolts 12 at 5 the top and bottom. In practice I find that these bolts 12 should be of special (le-sign in lniprorenn'nts in l'hnrrgenvy: lxit-Lot'hs. ot' wlm'h the following is a j i ,Wt-h ;in opemtinn may not interfere with or rhangr in any way the einer; `nej; actnatinf: har 'fm-h of snitl lmltM'oinprx' ;1 tongue, li), harin; a .'ri.--: bar lt at its inner end and an inlt'rinetliatn opening: ur slot 15, Extengling'frm-ly through thi- 'r. bar l' is mn- -nl ot" nn ulu-rating .At-ni LG to whivh i wrm'ul a rollar li :nlnptwl to engage ilu' inner t'zn't' of hail-lr. pring IS lies within tln' r'ning an'l engag t-ross hal' l-t so as to normzzlly iii-;ze tongue X3 to the position h'\\'n in Fig'. 3. nt the same time holding the .dt-nx lt' :mil itz vollar IT in the pofiitim shown in Fig. lt will lie seen that ii AStein 1G he hold against morenient, tongue 13 may nevertheless he cum-(led back into the casing against. the artion of spiing 18 Without being interferexl with by the then stationary stem 16; also. it' steln lit lhe mlled downwzn'tl. tongue '123 will he with rawn into the ('nsing l v reason of the pull exertefi on cross bar 1+ i rollar IT.

Tnrning now to the einergenry lock Structure, the, fnm'lznnentnl feature of the Structnre is a -re.. bar 21 whirh at its ends is provided with transverseiy extemling arms '22 or '23 t'nnfi ro-.hiring a neat U-shoped Operating' member. The arin 22 is pivoted to a braci-:et- :t ;nlaptul to he reatlily se' euretl to the inner far-e of the (loor 10. rm 23 is similarly pirotwl to ao em' of a easing 2G whirh is aho atlaptexl to he remlily seenreli io the inner tan' of (loor 10. Ann 23 cnrries a finger 'T whirh Projects into the interior of the wniog 2G. as. t'leariy shown in Figs. 2 znul 3.

i by a nn'rt` s'hntting swing' anl. in order that;

{onnted within easing 25 :u'e two plnngers SH .unl 32 which lie in 'a lane parallel with the face of the tloor aml are eapahle of Vertical nlorelnent `within the casing. Plnnger 2.1 has its lower end projected from thewasing 2h antl is adapted to receive a Stein 1G. while the plnnger has its upper emi projeetefl from the upper end of vnsing o aml is adnpted to receive a Stein 1G. lr. m'iler to allow for ineqnalities and for pnesible warpirg of the floor it is 'extrenn'l tlvsirahle that. in order to prevent possible stirlting of the parts. the Stein 1G he conneetetl to its plunger 31 or 32 by some means which will pernnt a limited amount. of angular rlisplaeement and for that reason I provide the end of stem '1 6 with a threadecl opening zulapted to receive orller that the (loor ma)l lnrealily closed ed to lie easily within a pocket 35 formcd in "the end of the plunger, and hall Bs pierced diametrically by a doubly coned passage '3G which, at its smallest diameter, eoinfortahly fits a pin 37 p: 'sed across tln` pocket 35.

It is very desnahle that the two piungers 31 and 32 lie in a plane nhieh is parallel with the face of the door in order that the casing 26 may be comparativt'ly thin so as not to stick out into the room and he nnsigl'itly. As these two plungers need to work in opposite direetions .wl should iz'e operahle independently by the emergeney bar 21, or by a knob from' the outside ot' the door., f connect the two plnngers 32 hy a lever 59 which lies within ('asing 26 and is provided at its opposite ends with pins 41 and 4'2 which take into notches 43 and :H formed respectivel)v in the plungrers 31 and 32. Plunger 31 is then provided with a notch 45 within which finger '27 may play, and with a shonlder 4.6 againstwhieh finger 27 may take in order to retract plung'er I;

into casing 2G. In' an apparatus of this kind it is very (lesirable that mauipulation of the door from the exterior by means of knol) 38 he wholly independent of manipulation of the door by means of the emergenq` bar 21 and therefore, while lever 39 is coneentric with the stem of the. knoh 38 yet it is not attached thereto and does not partale primarily of its motion. erate the piungers 31 and 3:3 by means of the linob I secure to the knob '-'teun within casing 26, an arm 51 which is adapted to engage a lever 52 pivoted within casing' 2G and provided with a finger 53 (dotted lines Fig. 2) which lies heneath a shoulder ((lotted lines Fig. 2) formed on plungel' 31 the arrangement being such that a turning of lfnfl) 38 iu one direet'ion. will cause arni 51 to eugage level' :32 and the finger of said levcr to engage shouhh-r 54 of plunger 31 thus drawing plunger 31 into casing 26 and causing a similar movement` in the opposite direction. of plunger 32' through the medium of the lever 39. In order to actuate the pluuger l v a movement of knob 38 in the other dirertion I provide a. spud 55 upon lever 39 which spud is adapted to he engaged in one diret'tion onl \I hy arm 51 so that when the kuoh is turned Jn a clockwise direction (Fig. 2) the actuaand 32 will he f through the medium of the lever 39, wheretion of the plungers 31 as when the knoh is turned in :r counterclockwise direction the actuation of the plnngers will be through the medium of level' It will thus he seen that. the kuoh may hc positively locked against artuation without in any way interl'ering with the aetuation of the plnngers through the niedimn of the emcrgency har and in order to accomplish a. loeking of the knoh l provide in order to opz avm 51 in the usual manner with a noteh 5G iadapted to receive he hoohed end of an lordinary dead-looking level' 57 pivoted within the casing; 2G, said lever 57 being eng'aged by an ordinary sliding bar 58 zn'ftnated by means of an ordinary key ini serted through the key hole 61. The plnngers 31 and 32 are normally hold in projected position hy means of a spring G2 which, i in the present illustration, is showr .Is eni eazing plnnger 31.

lt is Yery essential that the emergency bar 21 he at all times in position to be effective in operation of the looking mechanism so paratns will result in an inoperativc condition. It needs therefore to he yieldingly hold in its operative position hy a means which is' distinct fr'om and nnaifected by the meehanism hy which the holts may he withdrawn from the exterior of the door and theret'ore normally yioldingly hold the har 21 at some distanee from the faee of the door, in the position indieated iu full lines in Fig. 3, h) means of light Springs (3? one of which is nesled between the hracket :'21 and arm 22 and another of which is silnilarl)Y nested between arm 23 and car 25. the arrangement being such that, throughont any aetuation of the :ipparatus by means of knoh 38, bar 21 will remain in the position shcwn in full lines in Fig. 3 and will therefore at all times he in position to he carried through its aetuating movemenl. to the position indicated in dotted lines in Fig. 3, by any force exerted thereon and having even a small component in the direetion of opening the door.

The edperating door 11 might he provided with an apparatns sur-h as is applied to door 10 hut. this is not at all necessary as the hults 12 are sullicient to hold holh doors in place if merhanism is' provided which Will interiot'lt with the door 10. As a eonsequenr'e I provide for the door 11 a modified apparalus` which is not only suitahle for'use on the twin door 11 hut may also he used on an ordinary single door. In this form I provide a har 21 having' an arm 2z at. one end and an arni E23 at the other. 'l'he ariu 22 is connected to a ln'acln't 24 and the arm 23 is provided with a finger 27, these parts being' exactly the same as the similarly lettered parts in the structure already descrihed. In the present form. arm 23 is pivoted to an ear T1 carried by a easing 72 which, in most particulars. is like the casino; 2G. The internal nn'vlmnism hnvever is somcwhat less eonxplieated mving` to the fzn't that the holtor pluug'el' '721 carried l v this 'a.'iu 'r need not. he in duplicat". and is arranged so as to eugagedirertly with au ordinauv strike. carried h v the i opposing door 10 or by the adjacent, jamb,

.earryiug looking members 59 which may be that no carclessness or failure to set the api means for prerenti'ug the aeluation ot the t holt by the external operatiuY member u'ithi out interfe'ringigitlr-act'natiou by the intei rior operator.

An emergeney exit lock comprising a main casiug adapted to be. secured to a door, a pair of plungers anrauged in said casing With their adjaceut ends separated and in a plane substantially parallel with the face of the door, an intermediate connection between the adjaceut cuda` of said plungers to cause relatire opposite mo\'e inent, an operating member comprising-an f Operatingr bar having it; arms' pirotally upported upon an axis' :ubstantially parallel with the door, means carried by said bar for j operating Said plungers l a morement of the main body of the bar tou'ard the, door, au external operatiug member adapted to be proiected from that face of the doorl oppch'ile that upon u'hieh the operaiing bar is arrangcd, intermediate "ouma'tious between said external operatiug member and the plungers for operating the `same permitting normal free aetuatiou of the pluugers by the exterior opcrat.iu; r member. and means for preveutiug :zctuation of said plungers by said external operating nieulber Without interteriir;r u'il'h the operation of theL-operating bar.

(i. in emergeuey exit lock eomprising, a main casiug adapted to be Seeured to a door, a pair of plnuger., arranged in said easing With their adjaeeut end.Q Feparated aud in a plaue, snbatantiallf; parallel with the face of the door, au intermediate connection between the adjaeent ends of Said plungers to cause relative oppizsite moremeut, an operzu'in T member comprisinz an Operating bar having its arms pivotally supported upon an axis substantially parallel with the door, means carried by said bar tor operating` said phmgers by a mm'emeutof the main bed)I of the bar toward 'the door, and a pair of spriner lat'f'lurs audha. connection between each of said lat'ehes and one of the phmgers actiug upon 'he latch in withdrawi ing direction only.

T. An emergenf'y exity lock eomprising, a main casiug adaptcd to bc secured to a door, a pair of plungers arrangcd in Said casing With their adjaeent euds separztted and in a plane substautially parallel with the face of the door. an intermediate connection between the a-'tjacent ends of said plungers to cause relative opposite movement, an operatiu: member comprising an Operating bar pivotally supported upon an axis substantially pa 'allel with the door, means carried by said bar for Operating said plungers by a movement of the main body of the bar toward the door, .fm external ope'ating member adapted to bc projeeted from that face of the door opposite that upon which the Operating bar is arranged, intermediate 'oimevtirais between said external Operating member and the pluugers for Operating the same, miana for preventing actuation of Said plunfzers by said external Operating member without interfering with the operation or' the op :rating bar, and a pair of spring lau'hes and a connection between each of said tatchcs' and one of the plungers acting upon the lateh in withdrairmg direckt'i'on only.

S. An emergeacy exit block comprising, a main ea ng adapted to be seeured to a door` a pair of pbme'ers arranged in Said casing aitb zaeir adjaeent euds separated and in a planiubtantially parallel With the face ot the door, an intermediate connection betu'ee'i the adja'ent ends of `Qaid plungers to cause relatire oppr'ite movemenL an Operating member eomprising an aperatiug bar piroially supported upon an axisv ubaantiallj: parallel with the door. means carried b): ;aid bar l'i'r peratin j T Raid plunfzers by a nan-eniem ot' the main body of the bar toward the door` an'd a pair of spring iati'heV au'l a tranrersely loos'e connection between each of said latehes and one of the pluugesi`` aeting upon the lateh in withdrawiuz lireetiou only.

9. -Xn emergeney exit lock eomprising, a

main ezzsing adapted to be Feeured to a door, a pair of plnugers arrauged iu -Qaid casiug with their adjaeent cuda` separated and in a plaue wbstantially parallel with the face of the door. an intermediate connection between the adjaeent cuda of said pluugzers to 100 eau e relatire opposite iiiorena'nt, au opcrating member eomprising au operating` bar pirotally supported upon an axis substantiaily parallel with the door, means earried by said bar for opcrating said plune'ers by a mo'cement. of the main body of the bar vtm'ard the door, an external operating member adapted to be projected from that tace of the door opposite that upon which the Operating bar is arra'igeil` intermediate conncctions between said external opera'riug member and the lungers for Operating the ame, and means or prereutiug actuation of said plnngers by said external Operating member without iuteri'eriuer with the opera- 115 tion of the Operatingr bar, and a pair of spring latches and a transrersely loose connection between each of said'latches and one of theplunfzers aeting upon the latch in withdrawing directiou only.

10. Tzi a panie bolt, two :dincd oppositely projectinz bolt member means for projecting and relraetiug said bolts `aiuu'iltaueously and in oppositedireetion includingr iu'o manually operalde aetuating devices independeully mounted and indewndently movable.

11. In a panie. bolt` two aliued oppositely projecting l'olt, members, means for pmjee i'ng and retractmg said bolts smial' zeour'y :md in Oppositke direcons including two manually operuble 'actunting devices indcj pcndeuty mnuntc'd and indcpcndenfly movabe, and a cgging device fm' blucking one I of said actuating member' having the ther 7 free to bc moveu.

In wltness whereof, I, have hereunto set 

